Bookmark and Share

Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down at the end of May, and its replacement, statalist.org is already up and running.


[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: "Prob > F = . " following clustered panel analysis. Why?


From   "Julia Ke" <julia.ke@gmx.net>
To   statalist@hsphsun2.harvard.edu
Subject   st: "Prob > F = . " following clustered panel analysis. Why?
Date   Tue, 27 Nov 2012 19:59:35 +0100

Hi Statalist, 

I am working on a panel data analysis whereby I use a country and time fixed effect and cluster by firm (panel).

My question concerns the F-test result after clustering. The model I am using is of the form

xtset firm year
xi: regress y x1 x2 x3 x4 x5 i.country i.year, robust cluster(firm)

Without the cluster-command, I get an F-value and a Prob > F = 0.000. Once I add 'cluster(firm)' however, I do not get one, I get: 'F(number,number)= .' and 'Prob > F = .'

I am trying to understand the underlying cause and solve it. Does anyone have experience with this issue? 

Many thanks, 
Julia



*
*   For searches and help try:
*   http://www.stata.com/help.cgi?search
*   http://www.stata.com/support/faqs/resources/statalist-faq/
*   http://www.ats.ucla.edu/stat/stata/


© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   Site index